No Audio in WhatsApp Calls

REPRODUCIBILITY: 100%
OS VERSION: 5.0.0.67
HARDWARE: XA2 Dual Sim
UI LANGUAGE: English
REGRESSION: New

DESCRIPTION:

There is no audio present during WhatsApp calls (both video and audio).

PRECONDITIONS:

WhatsApp account.

STEPS TO REPRODUCE:

  1. Make or receive a video or audio call in WhatsApp

EXPECTED RESULT:

You can hear the other person.

ACTUAL RESULT:

You can’t hear the other person.

MODIFICATIONS:

None

ADDITIONAL INFORMATION:

This has occurred since the most recent minor update released for SFOS 5.0. Previously, there was a long-standing issue with low audio in WhatsApp video calls that could be worked around by plugging in and unplugging a set of headphones, But now there is no audio at all, and that work-around doesn’t work. Other Android audio applications (e.g. Signal, media players) work fine.

Combined with the frequent failure of audio during actual phone calls (another long-standing issue), this is rapidly making my phone unusable.